fbi will send the resources into the investigation. officials believe a mexican drug cartel may. agent who died was 30 years old nicholas ivy from utah leaving behind a wife and 2 children. >> parents demand answer after young girl assaulted at school. what they want from the district. we learn a key piece of evidence that led to his capture. >> also. the angel fly into town in. how soon you hear the ear splitting roar. >> in southern california. meet some real life crime fighters. they are dressed for the job. more and later on "nightline". >> big fat experiment. we'll follow one human guinea pig and three-month fast-food bender. >> team explore america here you go little man. [ humming ] [ babbling ] the cheerios bandit got you again? [ both laugh ] ♪ the one and only, cheerios ...and now... you! [ giggles ] ♪ the one and only, cheerios ♪ [ man ] excuse me miss. [ gasps ] this fiber one 90 calorie brownie has all the moist, chewy, deliciousness you desire. mmmm. thanks. [ man ] at 90 calories, the brownie of your dreams is now deliciously real. [ female announcer ] and no